creo que si... esto lo he sacado de yahoo, seccion de respuestas de la peña:
The M16 is capable of semi and full automatic fire.
The M16A2 is capable of semi automatic and 3 round burst. The A2 got a new adjustable rear sight, brass deflector, and forward assist.
The M16A3 is basically a M16A2 with full auto.
The M16A4 is standard issue for the USMC and has the flattop receiver developed for the M4. The handguard has a 4 rail system (Picatinny rails) like the M4 for attaching various accessories.
The M4 is capable of semi automatic and 3 round burst.
The M4A1 is capable of semi, 3 round burst, and full automatic fire.
sorry por el offtopic